Abstract
We have performed 426 total hip replacements since 1968. Here we report on a follow-up of 160 patients (197 joints) for more than 5 years after total hip replacement with the Chamley type, the Osaka-Shidai (Shidai) -type, the Muller-type, the Weber-Huggler type and the Surface Replacement (SRA) -type prostheses.
At 7 years after surgery, revision surgery had been performed in 10-20% of the Shidai and Muller types, and in 52% of the SRA type, but in none of the Charnley type. Component loosening was found in 40-48% of the Shidai and Muller type, 8% of the Chamley type and 48% of the SRA type.
In the Shidai type, stem loosening was found much more than socket loosening. All SRA type loosening cases involved prosthetic head loosening. The clinical results with the Chamley type were the best of all the types in J.O.A. scores, while those with the SRA type were the worst.
In the Charnley cases in which the greater trochanter was pulled down distantly, there was a high incidence of complication; for example, a clear zone between bone cement and bone tissue, wire breakage, and non-union of the greater trochanter.
